Could someone please check my math homework?

2 + 2 = 5
4 × 6 = 12
62 = 24
85 - 42 = 20
√961 = 13
43 = 49
93 modulo 7 = 16
143 ÷ 13 = 4

I think I did it well...

Note: This is a puzzle.

  • 1
    $\begingroup$ Hi @Ausername, welcome to Puzzling SE! Would it be possible to convert the image into text for accessibility purposes? Thanks, and nice first puzzle! $\endgroup$
    – HTM
    Apr 25 at 18:05

The most obvious first step to do is to

find the actual answers to the expressions. In order from top to bottom, they are: 4, 24, 36, 43, 31, 64, 2, 11.

Next, we

take the absolute difference between the correct and written answers. This gives us: 1, 12, 12, 23, 18, 15, 14, 7.


applying the A1Z26 transformation to these differences yields the phrase ALL WRONG. I don't know, but something tells me that you may need to double check your work here...

  • $\begingroup$ Thanks, and nice answer! $\endgroup$
    – A username
    Apr 25 at 21:54
  • 1
    $\begingroup$ Just out of curiosity, what was your thought process that led to this? I looked at this puzzle and was like - I have no idea of where to even start... $\endgroup$
    – Vilx-
    Apr 25 at 23:12
  • 5
    $\begingroup$ @Vilx- rot13(Gur svefg guvat V abgvprq jnf gung nyy gur nafjref jrer vapbeerpg, fb gur pbeerpg nafjref zhfg or vzcbegnag fbzrubj. Nsgre svaqvat gubfr, V gbbx gur qvssrerapr orgjrra gur pbeerpg naq tvira nafjref, juvpu vf n pbzzba znavchyngvba jurarire lbh unir cnvef bs ahzoref. Gung cebqhprq vagrtref gung jrer ab terngre guna 26, juvpu jnf n fvta gung jr fubhyq nccyl n N1M26 fhofgvghgvba. Fher rabhtu, nccylvat gung fhofgvghgvba tnir gur svany nafjre!) (Copy and paste this text into the link provided to decode it as it contains spoilers) $\endgroup$
    – HTM
    Apr 25 at 23:20
  • 2
    $\begingroup$ Also, I've seen other puzzles with this mechanism before, so it was easier to spot. Sometimes solving puzzles just comes down to experience! $\endgroup$
    – HTM
    Apr 25 at 23:28

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